﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;

namespace fqControl
{
    public class fqTabControl:TabControl 
    {
        const int CLOSE_SIZE = 10;
        #region 新加属性
        private bool fqDoubleClick;

        public bool FqDoubleClick
        {
            get { return fqDoubleClick; }
            set { fqDoubleClick = value; }
        }
        #endregion
        public fqTabControl()
            : base()
        {
            this.DrawMode = TabDrawMode.OwnerDrawFixed;
        }
        protected override void OnMouseDoubleClick(MouseEventArgs e)
        {
            base.OnMouseDoubleClick(e);
            if (FqDoubleClick == true)
            {
                TabPage tabPage = this.SelectedTab;
                this.TabPages.Remove(tabPage);
            }
        }
        protected override void OnDrawItem(DrawItemEventArgs e)
        {
            base.OnDrawItem(e);
            try
            {
                Rectangle myTabRect = this.GetTabRect(e.Index);

                //先添加TabPage属性   
                e.Graphics.DrawString(this.TabPages[e.Index].Text, this.Font, SystemBrushes.ControlText, myTabRect.X + 2, myTabRect.Y + 2);

                //再画一个矩形框
                using (Pen p = new Pen(Color.White))//Color.White
                {
                    myTabRect.Offset(myTabRect.Width - (CLOSE_SIZE + 3), 2);
                    myTabRect.Width = CLOSE_SIZE;
                    myTabRect.Height = CLOSE_SIZE;
                    e.Graphics.DrawRectangle(p, myTabRect);
                }

                //填充矩形框
                Color recColor = e.State == DrawItemState.Selected ? Color.Red : Color.White;
                using (Brush b = new SolidBrush(recColor))
                {
                    e.Graphics.FillRectangle(b, myTabRect);
                }

                //画关闭符号
                using (Pen objpen = new Pen(Color.Black))
                {
                    //=============================================
                    //自己画X
                    //"\"线
                    Point p1 = new Point(myTabRect.X + 3, myTabRect.Y + 3);
                    Point p2 = new Point(myTabRect.X + myTabRect.Width - 3, myTabRect.Y + myTabRect.Height - 3);
                    e.Graphics.DrawLine(objpen, p1, p2);
                    //"/"线
                    Point p3 = new Point(myTabRect.X + 3, myTabRect.Y + myTabRect.Height - 3);
                    Point p4 = new Point(myTabRect.X + myTabRect.Width - 3, myTabRect.Y + 3);
                    e.Graphics.DrawLine(objpen, p3, p4);

                    //=============================================

                }
                e.Graphics.Dispose();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        protected override void OnMouseDown(MouseEventArgs e)
        {
            base.OnMouseDown(e);
            if (e.Button == MouseButtons.Left)
            {
                int x = e.X, y = e.Y;
                //计算关闭区域   
                Rectangle myTabRect = this.GetTabRect(this.SelectedIndex);

                myTabRect.Offset(myTabRect.Width - (CLOSE_SIZE + 3), 2);
                myTabRect.Width = CLOSE_SIZE;
                myTabRect.Height = CLOSE_SIZE;

                //如果鼠标在区域内就关闭选项卡   
                bool isClose = x > myTabRect.X && x < myTabRect.Right && y > myTabRect.Y && y < myTabRect.Bottom;
                if (isClose == true)
                {
                    this.TabPages.Remove(this.SelectedTab);
                }
            }
        }
    }
}
